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Level 4 Commitments, Legal Proceedings and Contingencies, and Guarantees (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Purchase Commitment, Excluding Long-term Commitment [Line Items]    
Log and fiber purchase obligations $ 157,000,000  
Utility purchase commitments 10,500,000  
6.375% senior notes [Member]
   
Purchase Commitment, Excluding Long-term Commitment [Line Items]    
6.375% senior notes, book value $ 299,990,000 $ 250,000,000
Interest rate 6.375%